Who is Participating?

To add to the above:
start allows for running the called script/application in parallel (if usually not running detached), and to explicitely wait for termination for applications which usually run detached.
call is only useful (and necessary) if you want to call other .cmd/.bat files. Else you do not need to use call.

Running that wil have the desired result. Script one is calling script two, and script one continues after script two has finished.
Omitting the CALL statement, only using
Script-two.cmd
will execute script two, but not return to script one.

call Notepad.exe
and
Notepad.exe
are the same. Because Notepad is an application, not a batch file, the call is optional.
In both cases notepad is opened, but the calling script continues.

start /wait Notepad.exe
will start a notepad, and wait until termination.